[sdiy] NIC-based wave folder/shaper

[harrybissell]

And sine waves are fun to play with as well....

I think this circuit begs to have a tracking bipolar supply
connected to the opamp so you can vary the point at which
the opamp saturates....

hmmmm

H^) harry

Ian Fritz wrote:

> Hi all --
>
> A couple more observations on the NIC waveshaper.
>
> 1.) The opamp output is also interesting. It deforms from square to saw
> with constant amplitude.  What other way is there to do this?  I can only
> think of a variable-gain clipping amplifier,  but this would need very high
> gain to get a steep transition, whereas the NIC divider is intrinsically
> steep.
>
> 2.)  Driving the circuit with a tri produces a folded waveform, which may
> also be useful, but again gain compensation would probably be needed.  The
> opamp output in this case deforms from square to triangle with constant
> amplitude.
>
>    Ian